Firearm rail chassis



FIG. 1 shows a perspective view of a firearm rail chassis in a use configuration with environment;

FIG. 2 shows another perspective view of the firearm rail chassis of FIG. 1 ;

FIG. 3 shows a back side view thereof;

FIG. 4 shows a front view thereof;

FIG. 5 shows a left view thereof;

FIG. 6 shows a right view thereof;

FIG. 7 shows a top view thereof;

FIG. 8 shows a bottom view thereof; and,

FIG. 9 shows a perspective view of the firearm rail chassis of FIG. 1 in a use configuration with environment.

The dashed lines in FIGS. 1 and 9 depict environment of a hinge cover, dust cover, and a firearm that form no part of the claimed design. The dashed lines in FIGS. 2-8 depict portions of the firearm rail chassis that form no part of the claimed design. 

CLAIM I claim the ornamental design for a firearm rail chassis, as shown and described. 